Imaginary Picture of K2-11 b

Display orbital revolution of K2-11 b around the hoststar K2-11
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Exoplanet Name : K2-11 b
Alternate Name : "EPIC 201596316 b, 2MASS J11161006+0159128 b, EPIC 201596316.01, WISE J111610.04+015912.3 b"
Radius (Rjup / Re): 0.6740 (Rjup) 7.5549 (Rearth)
Mass (Mjup / Me): 0.3001 (Mjup) 95.4225 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2257 (AU) 0.2257 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.1093
Orbital Period(Observed/Estimated) 39.94 (Days Obs.) 33.71 (Days Est.)
Surface Gravity (G Earth) 1.6719
Star Radiation at Atmospheric Boundary: 556307.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1218.9 (K)
Blackbody T 0.3(K) 1144.7 (K)
Blackbody T 0.7(K) 926.2 (K)
Tidally Locked Blackbody T 0.1(K) 1449.5 (K)
Tidally Locked Blackbody T 0.3(K) 1361.3 (K)
Size Class: sub-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-11
Alternate Name : "EPIC 201596316, 2MASS J11161006+0159128, WISE J111610.04+015912.3"
Star Distance(LY) : 1084.3
Stellar Radius(Rsun) : 5.2 (Rsun Measured)
Stellar Mass(Msun) : 1.4 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5433 (K)
Spectral type : G8
UV portion[%]: 6.6
Visible portion[%]: 42.7
IR portion[%]: 50.7
Metalicity : -0.1
Absolute Magnitude: 4.3
Apparent Magnitude: 11.9
Right Ascension(RA) 169.0419
Declination (DEC) 1.9868
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=K2-11+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-11 b
K2-11 b

  • K2-11 b is an exoplanet orbiting the star K2-11, located about 1084.3 light-years (332.5 pc) away from Solar System. Its discovery was publicly announced on 2015.
  • The host star K2-11 has apparent magnitude of 11.9, with absolute magnitude of 4.3.
  • It is 1.4 times more massive and 5.2 times bigger compared with our Sun. The surface temperature is 5433 with its spectral types of G8
  • In this planetary system, the extrasolar planet K2-11 b orbits around the star K2-11 every 39.9 days with its orbital distance of 0.23 AU ( 33764239.4 km)
  • (Projected orbit of K2-11 b around its host star K2-11)


  • The Star K2-11 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 3.293 AU ( 492657106.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 4.552 AU ( 680980867.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 6.936 AU ( 1037664141.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 10.207 AU ( 1526968241.2 km)
  • Radiation at Planetary Boundary of K2-11 b : 556307.57 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-11)



  • Kopparapu Recent Venus for Star K2-11 distance : 3.483 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-11 distance : 4.410 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-11 distance : 4.259 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-11 distance : 4.672 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-11 distance : 7.868 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-11 distance : 8.299 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-11)



  • Original Kopparapu Recent Venus for Star K2-11 distance : 3.466 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-11 distance : 4.537 AU
  • Original Kopparapu Moist Greenhouse for Star K2-11 distance : 4.586 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-11 distance : 8.004 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-11 distance : 8.323 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-11)



    (Position in Stellar Map of star K2-11 and its Exoplanet K2-11 b)



    (Zoomed position in Stellar Map of star K2-11 and its Exoplanet K2-11 b (zoom level 3))

    (Synthetic Spectrum of star K2-11*)
    *Yamashiki YA et al. 2019 ApJ 881 114
    MUSCLES Paper I - France et al. 2016 ApJ 820 89
    MUSCLES Paper II- Youngblood et al. 2016 ApJ 824 101
    MUSCLES Paper III- Loyd et al. 2016 ApJ 824 102